Q:
Can someone please help me! I’m going crazy here. I had ran a few test on the first tumbler and everything came out perfect but as soon as I enlarged the image and started to burn the actual tumbler I was going to do, the image ended up with a rainbow type burn on one of the fish and then completely just burned the white marlin image. I’m not sure what I did wrong but even when I decided to go with the rainbow burn it still didn’t stay consistent. I’m using an 60watt Omglaser with a 150mm lens (since I’m not able to fit the tumbler with the 300mm lens) and using the lightburn program.

A1:
You’re beyond the curve/capability of the lens to stay in focus and you’re annealing the outer areas.
It would be better using the rotary, or as you mention the larger lens. You’re engraving a 3d object with a 2d laser – it has just gone out of range.

A2:
My 60 w mopa settings with OMG Laser
300mm lens, cylinder correction on
Power 40%
Speed 1000mm/s
LPI .05
Q pulse 150
Freq 200

1 pass, with cross hatch.

A3:
I run the same with my 60W MOPA….I just make sure that the first hatch is top to bottom and the cross hatch is side to side.

A4:
You’re anealing the metal. Only way to avoid that with a fiber laser is a rotary to maintain a constant distance from the piece.

A5:
Did you re hatch after resizing?
No doubt you hit the hatch button again after resizing?